Elastic-fluid turbine.



No. 852,030. PATENTED APR. 30, 1 907.

W. A. NUSSBAUMER. ELASTIC FLUID TURBINE.

APPLICATION FILED SEPT.8.1906,

@m28565 M w 14/ WW, W w F f UNITED STATES PATENT OFFICE.)

WILLIAM A. NUSSBAUM-ER, OF MILWAUKEE, WISCONSIN.

ELASTIC-FLUID TURBINE.

Specification of-Letters Patent.

Patented April 30,1907.

Application filed September 8. 1906- Serial No. 333,839.

'the vane supporting and fastening means and is applicable to both the stationary and rotating parts of a turbine. Its main objects are to securely fasten and hold the vanes in placewithout calking, which is a laborious operation and does not produce a reliable fastening; to facilitate removing and replacing the vanes singly or by rows; and generally to simplify and improve devices of this class.

It consists in certain novel features of construction and in the peculiar arrangement and combination of parts as hereinafter par' ticularly'described and pointed out in the claims.

In the accompanying drawing, illustrating several forms in which the invention may be embodied as applied either to the rotating or stationary members of a turbine, like characters designate the same parts in the several figures.

Figure 1' is a partial plan view and section on the line 1 1., Fig. 2, of one form of the device; Fig. 2 is a section of the same on the line 2 2, Fig. 1; Fig. 3 is a partial plan view and section on the line 3 3, Fig. 4, of a modification of the device; Fig. 4 is a section on the line 4 4, Fig. 3; Fig. 5 is a partial section corresponding with that of Fig. 4 and showinga s ight modification of the construction thereby illustrated; Fig. 6 is a partial plan view and section on the line 6 6, Fig. 7, of still another modification of the device; Fig. 7 is a section on'the line 7 7, Fig. 6; and Fig. 8 is a' section corresponding, to that of Fig. 7, and showing a slight modification of the contruction thereby illustrated.

Referring to Figs. 1 and 2, a designates vane su porting rings each formed on one side wit an annular flange b and on the opposite side with a corresponding recess intowhich the flange of the adjoining ring fits, thereby centering and securely holding the several rings in place when they are assenv bled as shown. The laterally projecting flange 1) of each ring is formed with a circular series of uniformly spaced radial grooves 13. which open through the inner and outer curved faces and the intervening lateral face of the flange. These grooves are made. of dovetail form or their bottoms are inclined, as indicated by dotted lines in Fig. 2.

The vanes dhave dovetailed shanks fitted i in said grooves and clamped in place therein between adjoining rings when the parts are assembled. To equally distribute the pressure upon-the vane shanks and to firmly hold thev individual vanes securely in place by compensating for any slight inaccuracy in fitting, key pieces e, which may be made of copper or soft metal wire bent into annular form, are inserted in annular grooves in adjoining faces of the rings and engage with corresponding notches in the edges ofthe vane shanks. When the arts are clamped together the notched e ges of the vane shanks embed themselves more or less in these key pieces, and any play which they might otherwise have in the grooves c'is thus taken up.

Referring to Figs. 3 and 4, the dovetailed shanks of the vanes d are fitted ill-grooves 0 formed in one of the curved faces of each of the rings 6. In this case the grooves open on both lateral faces of the rings and the rings in which they are formed are separated by spacing rings a. The adjoining faces of the rings on one side of each row of vanes are beveled to correspond with the inclination or taper of the vane shanks, so as to securely bind and hold the vanes in place and revent longitudinal displacement thereof when the parts are assembled and clamped together, as shown. The vane supporting rings in this case are centered and held concentric with each other by a drum or cylinder Instead of the dovetailed or tapered for-- wires e are inserted in the adjoining grooved faces of the rings a and b on both sides of each row of vanes (Z, and engage correspond-- ing notches in their opposite edges. In other respects the construction is substantially like that shown in Figs. 3 and 4.

Referring to Figs. 6 and 7, the shanks of the vanes d are of angular formation, as shown in Fig. 6, and the oblique portions of ICO - drum or case such-as is shown in Fig. 4.

' by key wires e, as shown in Fig. 8.

' the recess in the adjoining spacing ring and Fig-6, the vanes may be formed with straight are bound.

the shanks are fitted and inserted in corresponding grooves in rings 5'. These rings are fitted in annular recesses formed in flanged spacing rings 41', and are clamped with the parts of the vane shanks protruding therefrom between the flanges and the opposing faces of the spacing'rings. "The lateral faces of the flanges on the spacing rings and the adjoining faces of the groovedrings are beveled or inclined so as to securely bind and hold the grooved rings and vanes in place. The rings bf are made somewhat-narrower than the recesses in the rings a, so that the flange on each spacing ring will project into" thus center and hold the parts in the proper relation to eachother; without a supporting In place of the angular shanks shownin flat shanks, as shown in Figs-1 and 3, and these may be tightly held between the grooved rings 6 and the spacing rings a' v In any of the several forms of the device herein shown and described, the vanes may be easily and quickly removed and replaced either singly or in rowsby simply releasing and separating the ringsbetween which they centric vane supporting rings fitted'together.

side by side and having radiating grooves arranged m, circular series, vanes having shanks fitted in said grooves and clamped between adjoining rings,- and a key piece fitted in annulargrooves in the opposing faces of adj oining rings and engagingqwith corresponding notches in the vane shanks, substantially as described;

3. The combination of a number of concentric vane supporting rings having interfitting lateral annular recesses and flanges, and vanes having their shanks fitted and clamped in circular series of radiating grooves between, fsaid rings, substantially as described Inwitness whereof I hereto affix my signature in presence of twowitnesses.

, WILLIAM A; NUSSBAUMER. Witnesses v i I CHAS. L; Goss, PAUL G. Rons'rr. 

